CVE-2020-5397
CSRF attack via CORS preflight requests with Spring MVC or Spring WebFlux
Description
Spring Framework, versions 5.2.x prior to 5.2.3 are vulnerable to CSRF attacks through CORS preflight requests that target Spring MVC (spring-webmvc module) or Spring WebFlux (spring-webflux module) endpoints. Only non-authenticated endpoints are vulnerable because preflight requests should not include credentials and therefore requests should fail authentication. However a notable exception to this are Chrome based browsers when using client certificates for authentication since Chrome sends TLS client certificates in CORS preflight requests in violation of spec requirements. No HTTP body can be sent or received as a result of this attack.
How to fix CVE-2020-5397
To remediate CVE-2020-5397, upgrade the affected package to a fixed version below.
- —upgrade to 5.2.3 or later
- —upgrade to 5.2.3 or later
Is CVE-2020-5397 being exploited?
Low — EPSS is 0.9%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- >= 5.2.0, < 5.2.3
- >= 5.2.0, < 5.2.3
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM5.3 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N |